613 lines
19 KiB
C
613 lines
19 KiB
C
/*
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* OMAP2/3 System Control Module register access
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*
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* Copyright (C) 2007, 2012 Texas Instruments, Inc.
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* Copyright (C) 2007 Nokia Corporation
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*
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* Written by Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#undef DEBUG
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include "soc.h"
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#include "iomap.h"
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#include "common.h"
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#include "cm-regbits-34xx.h"
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#include "prm-regbits-34xx.h"
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#include "prm3xxx.h"
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#include "cm3xxx.h"
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#include "sdrc.h"
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#include "pm.h"
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#include "control.h"
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/* Used by omap3_ctrl_save_padconf() */
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#define START_PADCONF_SAVE 0x2
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#define PADCONF_SAVE_DONE 0x1
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static void __iomem *omap2_ctrl_base;
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static void __iomem *omap4_ctrl_pad_base;
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#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
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struct omap3_scratchpad {
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u32 boot_config_ptr;
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u32 public_restore_ptr;
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u32 secure_ram_restore_ptr;
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u32 sdrc_module_semaphore;
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u32 prcm_block_offset;
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u32 sdrc_block_offset;
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};
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struct omap3_scratchpad_prcm_block {
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u32 prm_contents[2];
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u32 cm_contents[11];
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u32 prcm_block_size;
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};
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struct omap3_scratchpad_sdrc_block {
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u16 sysconfig;
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u16 cs_cfg;
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u16 sharing;
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u16 err_type;
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u32 dll_a_ctrl;
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u32 dll_b_ctrl;
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u32 power;
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u32 cs_0;
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u32 mcfg_0;
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u16 mr_0;
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u16 emr_1_0;
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u16 emr_2_0;
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u16 emr_3_0;
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u32 actim_ctrla_0;
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u32 actim_ctrlb_0;
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u32 rfr_ctrl_0;
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u32 cs_1;
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u32 mcfg_1;
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u16 mr_1;
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u16 emr_1_1;
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u16 emr_2_1;
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u16 emr_3_1;
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u32 actim_ctrla_1;
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u32 actim_ctrlb_1;
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u32 rfr_ctrl_1;
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u16 dcdl_1_ctrl;
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u16 dcdl_2_ctrl;
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u32 flags;
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u32 block_size;
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};
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void *omap3_secure_ram_storage;
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/*
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* This is used to store ARM registers in SDRAM before attempting
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* an MPU OFF. The save and restore happens from the SRAM sleep code.
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* The address is stored in scratchpad, so that it can be used
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* during the restore path.
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*/
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u32 omap3_arm_context[128];
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struct omap3_control_regs {
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u32 sysconfig;
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u32 devconf0;
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u32 mem_dftrw0;
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u32 mem_dftrw1;
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u32 msuspendmux_0;
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u32 msuspendmux_1;
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u32 msuspendmux_2;
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u32 msuspendmux_3;
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u32 msuspendmux_4;
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u32 msuspendmux_5;
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u32 sec_ctrl;
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u32 devconf1;
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u32 csirxfe;
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u32 iva2_bootaddr;
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u32 iva2_bootmod;
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u32 debobs_0;
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u32 debobs_1;
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u32 debobs_2;
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u32 debobs_3;
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u32 debobs_4;
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u32 debobs_5;
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u32 debobs_6;
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u32 debobs_7;
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u32 debobs_8;
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u32 prog_io0;
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u32 prog_io1;
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u32 dss_dpll_spreading;
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u32 core_dpll_spreading;
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u32 per_dpll_spreading;
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u32 usbhost_dpll_spreading;
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u32 pbias_lite;
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u32 temp_sensor;
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u32 sramldo4;
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u32 sramldo5;
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u32 csi;
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u32 padconf_sys_nirq;
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};
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static struct omap3_control_regs control_context;
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#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
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#define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg))
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#define OMAP4_CTRL_PAD_REGADDR(reg) (omap4_ctrl_pad_base + (reg))
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void __init omap2_set_globals_control(void __iomem *ctrl,
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void __iomem *ctrl_pad)
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{
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omap2_ctrl_base = ctrl;
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omap4_ctrl_pad_base = ctrl_pad;
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}
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void __iomem *omap_ctrl_base_get(void)
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{
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return omap2_ctrl_base;
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}
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u8 omap_ctrl_readb(u16 offset)
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{
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return readb_relaxed(OMAP_CTRL_REGADDR(offset));
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}
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u16 omap_ctrl_readw(u16 offset)
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{
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return readw_relaxed(OMAP_CTRL_REGADDR(offset));
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}
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u32 omap_ctrl_readl(u16 offset)
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{
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return readl_relaxed(OMAP_CTRL_REGADDR(offset));
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}
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void omap_ctrl_writeb(u8 val, u16 offset)
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{
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writeb_relaxed(val, OMAP_CTRL_REGADDR(offset));
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}
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void omap_ctrl_writew(u16 val, u16 offset)
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{
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writew_relaxed(val, OMAP_CTRL_REGADDR(offset));
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}
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void omap_ctrl_writel(u32 val, u16 offset)
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{
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writel_relaxed(val, OMAP_CTRL_REGADDR(offset));
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}
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/*
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* On OMAP4 control pad are not addressable from control
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* core base. So the common omap_ctrl_read/write APIs breaks
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* Hence export separate APIs to manage the omap4 pad control
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* registers. This APIs will work only for OMAP4
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*/
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u32 omap4_ctrl_pad_readl(u16 offset)
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{
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return readl_relaxed(OMAP4_CTRL_PAD_REGADDR(offset));
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}
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void omap4_ctrl_pad_writel(u32 val, u16 offset)
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{
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writel_relaxed(val, OMAP4_CTRL_PAD_REGADDR(offset));
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}
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#ifdef CONFIG_ARCH_OMAP3
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/**
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* omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
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* @bootmode: 8-bit value to pass to some boot code
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*
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* Set the bootmode in the scratchpad RAM. This is used after the
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* system restarts. Not sure what actually uses this - it may be the
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* bootloader, rather than the boot ROM - contrary to the preserved
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* comment below. No return value.
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*/
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void omap3_ctrl_write_boot_mode(u8 bootmode)
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{
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u32 l;
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l = ('B' << 24) | ('M' << 16) | bootmode;
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/*
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* Reserve the first word in scratchpad for communicating
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* with the boot ROM. A pointer to a data structure
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* describing the boot process can be stored there,
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* cf. OMAP34xx TRM, Initialization / Software Booting
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* Configuration.
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*
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* XXX This should use some omap_ctrl_writel()-type function
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*/
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writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
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}
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#endif
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/**
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* omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor
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* @bootaddr: physical address of the boot loader
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*
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* Set boot address for the boot loader of a supported processor
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* when a power ON sequence occurs.
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*/
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void omap_ctrl_write_dsp_boot_addr(u32 bootaddr)
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{
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u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR :
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cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR :
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cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
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soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
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0;
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if (!offset) {
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pr_err("%s: unsupported omap type\n", __func__);
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return;
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}
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omap_ctrl_writel(bootaddr, offset);
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}
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/**
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* omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor
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* @bootmode: 8-bit value to pass to some boot code
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*
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* Sets boot mode for the boot loader of a supported processor
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* when a power ON sequence occurs.
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*/
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void omap_ctrl_write_dsp_boot_mode(u8 bootmode)
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{
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u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD :
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cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD :
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0;
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if (!offset) {
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pr_err("%s: unsupported omap type\n", __func__);
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return;
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}
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omap_ctrl_writel(bootmode, offset);
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}
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#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
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/*
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* Clears the scratchpad contents in case of cold boot-
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* called during bootup
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*/
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void omap3_clear_scratchpad_contents(void)
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{
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u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
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void __iomem *v_addr;
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u32 offset = 0;
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v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
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if (omap3xxx_prm_clear_global_cold_reset()) {
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for ( ; offset <= max_offset; offset += 0x4)
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writel_relaxed(0x0, (v_addr + offset));
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}
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}
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/* Populate the scratchpad structure with restore structure */
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void omap3_save_scratchpad_contents(void)
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{
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void __iomem *scratchpad_address;
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u32 arm_context_addr;
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struct omap3_scratchpad scratchpad_contents;
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struct omap3_scratchpad_prcm_block prcm_block_contents;
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struct omap3_scratchpad_sdrc_block sdrc_block_contents;
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/*
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* Populate the Scratchpad contents
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*
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* The "get_*restore_pointer" functions are used to provide a
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* physical restore address where the ROM code jumps while waking
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* up from MPU OFF/OSWR state.
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* The restore pointer is stored into the scratchpad.
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*/
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scratchpad_contents.boot_config_ptr = 0x0;
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if (cpu_is_omap3630())
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scratchpad_contents.public_restore_ptr =
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virt_to_phys(omap3_restore_3630);
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else if (omap_rev() != OMAP3430_REV_ES3_0 &&
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omap_rev() != OMAP3430_REV_ES3_1 &&
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omap_rev() != OMAP3430_REV_ES3_1_2)
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scratchpad_contents.public_restore_ptr =
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virt_to_phys(omap3_restore);
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else
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scratchpad_contents.public_restore_ptr =
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virt_to_phys(omap3_restore_es3);
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if (omap_type() == OMAP2_DEVICE_TYPE_GP)
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scratchpad_contents.secure_ram_restore_ptr = 0x0;
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else
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scratchpad_contents.secure_ram_restore_ptr =
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(u32) __pa(omap3_secure_ram_storage);
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scratchpad_contents.sdrc_module_semaphore = 0x0;
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scratchpad_contents.prcm_block_offset = 0x2C;
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scratchpad_contents.sdrc_block_offset = 0x64;
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/* Populate the PRCM block contents */
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omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents);
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omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
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prcm_block_contents.prcm_block_size = 0x0;
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/* Populate the SDRC block contents */
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sdrc_block_contents.sysconfig =
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(sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
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sdrc_block_contents.cs_cfg =
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(sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
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sdrc_block_contents.sharing =
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(sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
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sdrc_block_contents.err_type =
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(sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
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sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
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sdrc_block_contents.dll_b_ctrl = 0x0;
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/*
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* Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
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* be programed to issue automatic self refresh on timeout
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* of AUTO_CNT = 1 prior to any transition to OFF mode.
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*/
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if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
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&& (omap_rev() >= OMAP3430_REV_ES3_0))
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sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
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~(SDRC_POWER_AUTOCOUNT_MASK|
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SDRC_POWER_CLKCTRL_MASK)) |
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(1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
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SDRC_SELF_REFRESH_ON_AUTOCOUNT;
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else
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sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
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sdrc_block_contents.cs_0 = 0x0;
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sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
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sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
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sdrc_block_contents.emr_1_0 = 0x0;
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sdrc_block_contents.emr_2_0 = 0x0;
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sdrc_block_contents.emr_3_0 = 0x0;
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sdrc_block_contents.actim_ctrla_0 =
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sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
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sdrc_block_contents.actim_ctrlb_0 =
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sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
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sdrc_block_contents.rfr_ctrl_0 =
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sdrc_read_reg(SDRC_RFR_CTRL_0);
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sdrc_block_contents.cs_1 = 0x0;
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sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
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sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
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sdrc_block_contents.emr_1_1 = 0x0;
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sdrc_block_contents.emr_2_1 = 0x0;
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sdrc_block_contents.emr_3_1 = 0x0;
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sdrc_block_contents.actim_ctrla_1 =
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sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
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sdrc_block_contents.actim_ctrlb_1 =
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sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
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sdrc_block_contents.rfr_ctrl_1 =
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sdrc_read_reg(SDRC_RFR_CTRL_1);
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sdrc_block_contents.dcdl_1_ctrl = 0x0;
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sdrc_block_contents.dcdl_2_ctrl = 0x0;
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sdrc_block_contents.flags = 0x0;
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sdrc_block_contents.block_size = 0x0;
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arm_context_addr = virt_to_phys(omap3_arm_context);
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/* Copy all the contents to the scratchpad location */
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scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
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memcpy_toio(scratchpad_address, &scratchpad_contents,
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sizeof(scratchpad_contents));
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/* Scratchpad contents being 32 bits, a divide by 4 done here */
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memcpy_toio(scratchpad_address +
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scratchpad_contents.prcm_block_offset,
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&prcm_block_contents, sizeof(prcm_block_contents));
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memcpy_toio(scratchpad_address +
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scratchpad_contents.sdrc_block_offset,
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&sdrc_block_contents, sizeof(sdrc_block_contents));
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/*
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* Copies the address of the location in SDRAM where ARM
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* registers get saved during a MPU OFF transition.
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*/
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memcpy_toio(scratchpad_address +
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scratchpad_contents.sdrc_block_offset +
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sizeof(sdrc_block_contents), &arm_context_addr, 4);
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}
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void omap3_control_save_context(void)
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{
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control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
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control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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control_context.mem_dftrw0 =
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omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
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control_context.mem_dftrw1 =
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omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
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control_context.msuspendmux_0 =
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omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
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control_context.msuspendmux_1 =
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omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
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control_context.msuspendmux_2 =
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omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
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control_context.msuspendmux_3 =
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omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
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control_context.msuspendmux_4 =
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omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
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control_context.msuspendmux_5 =
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omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
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control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
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control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
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control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
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control_context.iva2_bootaddr =
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omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
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control_context.iva2_bootmod =
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omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
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control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
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control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
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control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
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control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
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control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
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control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
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control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
|
|
control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
|
|
control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
|
|
control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
|
|
control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
|
|
control_context.dss_dpll_spreading =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
|
|
control_context.core_dpll_spreading =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
|
|
control_context.per_dpll_spreading =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
|
|
control_context.usbhost_dpll_spreading =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
|
|
control_context.pbias_lite =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
|
|
control_context.temp_sensor =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
|
|
control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
|
|
control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
|
|
control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
|
|
control_context.padconf_sys_nirq =
|
|
omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
|
|
}
|
|
|
|
void omap3_control_restore_context(void)
|
|
{
|
|
omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
|
|
omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
|
|
omap_ctrl_writel(control_context.mem_dftrw0,
|
|
OMAP343X_CONTROL_MEM_DFTRW0);
|
|
omap_ctrl_writel(control_context.mem_dftrw1,
|
|
OMAP343X_CONTROL_MEM_DFTRW1);
|
|
omap_ctrl_writel(control_context.msuspendmux_0,
|
|
OMAP2_CONTROL_MSUSPENDMUX_0);
|
|
omap_ctrl_writel(control_context.msuspendmux_1,
|
|
OMAP2_CONTROL_MSUSPENDMUX_1);
|
|
omap_ctrl_writel(control_context.msuspendmux_2,
|
|
OMAP2_CONTROL_MSUSPENDMUX_2);
|
|
omap_ctrl_writel(control_context.msuspendmux_3,
|
|
OMAP2_CONTROL_MSUSPENDMUX_3);
|
|
omap_ctrl_writel(control_context.msuspendmux_4,
|
|
OMAP2_CONTROL_MSUSPENDMUX_4);
|
|
omap_ctrl_writel(control_context.msuspendmux_5,
|
|
OMAP2_CONTROL_MSUSPENDMUX_5);
|
|
omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
|
|
omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
|
|
omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
|
|
omap_ctrl_writel(control_context.iva2_bootaddr,
|
|
OMAP343X_CONTROL_IVA2_BOOTADDR);
|
|
omap_ctrl_writel(control_context.iva2_bootmod,
|
|
OMAP343X_CONTROL_IVA2_BOOTMOD);
|
|
omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
|
|
omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
|
|
omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
|
|
omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
|
|
omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
|
|
omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
|
|
omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
|
|
omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
|
|
omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
|
|
omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
|
|
omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
|
|
omap_ctrl_writel(control_context.dss_dpll_spreading,
|
|
OMAP343X_CONTROL_DSS_DPLL_SPREADING);
|
|
omap_ctrl_writel(control_context.core_dpll_spreading,
|
|
OMAP343X_CONTROL_CORE_DPLL_SPREADING);
|
|
omap_ctrl_writel(control_context.per_dpll_spreading,
|
|
OMAP343X_CONTROL_PER_DPLL_SPREADING);
|
|
omap_ctrl_writel(control_context.usbhost_dpll_spreading,
|
|
OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
|
|
omap_ctrl_writel(control_context.pbias_lite,
|
|
OMAP343X_CONTROL_PBIAS_LITE);
|
|
omap_ctrl_writel(control_context.temp_sensor,
|
|
OMAP343X_CONTROL_TEMP_SENSOR);
|
|
omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
|
|
omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
|
|
omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
|
|
omap_ctrl_writel(control_context.padconf_sys_nirq,
|
|
OMAP343X_CONTROL_PADCONF_SYSNIRQ);
|
|
}
|
|
|
|
void omap3630_ctrl_disable_rta(void)
|
|
{
|
|
if (!cpu_is_omap3630())
|
|
return;
|
|
omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
|
|
}
|
|
|
|
/**
|
|
* omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
|
|
*
|
|
* Tell the SCM to start saving the padconf registers, then wait for
|
|
* the process to complete. Returns 0 unconditionally, although it
|
|
* should also eventually be able to return -ETIMEDOUT, if the save
|
|
* does not complete.
|
|
*
|
|
* XXX This function is missing a timeout. What should it be?
|
|
*/
|
|
int omap3_ctrl_save_padconf(void)
|
|
{
|
|
u32 cpo;
|
|
|
|
/* Save the padconf registers */
|
|
cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
|
|
cpo |= START_PADCONF_SAVE;
|
|
omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
|
|
|
|
/* wait for the save to complete */
|
|
while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
|
|
& PADCONF_SAVE_DONE))
|
|
udelay(1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
|
|
*
|
|
* Sets the bootmode for IVA2 to idle. This is needed by the PM code to
|
|
* force disable IVA2 so that it does not prevent any low-power states.
|
|
*/
|
|
static void __init omap3_ctrl_set_iva_bootmode_idle(void)
|
|
{
|
|
omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
|
|
OMAP343X_CONTROL_IVA2_BOOTMOD);
|
|
}
|
|
|
|
/**
|
|
* omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle
|
|
*
|
|
* Sets up the pads controlling the stacked modem in such way that the
|
|
* device can enter idle.
|
|
*/
|
|
static void __init omap3_ctrl_setup_d2d_padconf(void)
|
|
{
|
|
u16 mask, padconf;
|
|
|
|
/*
|
|
* In a stand alone OMAP3430 where there is not a stacked
|
|
* modem for the D2D Idle Ack and D2D MStandby must be pulled
|
|
* high. S CONTROL_PADCONF_SAD2D_IDLEACK and
|
|
* CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up.
|
|
*/
|
|
mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
|
|
padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
|
|
padconf |= mask;
|
|
omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
|
|
|
|
padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
|
|
padconf |= mask;
|
|
omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
|
|
}
|
|
|
|
/**
|
|
* omap3_ctrl_init - does static initializations for control module
|
|
*
|
|
* Initializes system control module. This sets up the sysconfig autoidle,
|
|
* and sets up modem and iva2 so that they can be idled properly.
|
|
*/
|
|
void __init omap3_ctrl_init(void)
|
|
{
|
|
omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
|
|
|
|
omap3_ctrl_set_iva_bootmode_idle();
|
|
|
|
omap3_ctrl_setup_d2d_padconf();
|
|
}
|
|
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
|